Mosaic of old river maps in ECW made from old river maps that have been scanned. After this, the leaf edges have been removed and the images are reorientated in RD. After this, a mosaic has been made in ECW format per print, series or revision. A corresponding index file (shape) can be found from which year each individual card is.
Hollandsche IJssel/[Rijkswaterstaat]. — Scale 1:2.500. — [first revision]. — [the Hague: Topographical Set-up, 1902-1924]. —1 series in 15 sheets: lithography; various formats. Some sheets with later reprints. A sketch map of the Hollandsche IJssel river has been added to the marker. — Scale 1:25,000. — The Hague: N.V. Wed. Ahrend & Son, [z.j.]. However, this card is most likely not part of the depositor.
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